Plan for DIMM replacement (Both cluster system would be down which is mandatory)

Hi Team,

We have to replacement DIMM on the passive node in which VCS services is currently not running.The cross over cables LLT  is hanged in such a way that we need to move both boxes (Active and passive nodes).It requires downtime because we will also have to shutdown active node.

We are now asking apps team for downtime for it.

Could you please suggest,the plan to proceed for this activity when we have to shutdown both nodes for DIMM replacement.

Currently, SG is running in Polar server.

-- SYSTEM STATE
-- System               State                Frozen

A  polar               RUNNING              0
A  summer            RUNNING              0

-- GROUP STATE
-- Group           System               Probed     AutoDisabled    State

B  ClusterService  polar               Y          N               ONLINE
B  ClusterService  summer              Y          N               OFFLINE
B  ORA_SG_Group   polar              Y          N               ONLINE
B  ORA_SG_Group   summer            Y          N               OFFLINE

This is bit urgent so require your suggestions as soon as possible.